Volume Converter

Convert volume between metric and imperial units instantly.

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About this calculator

Recipe chaos ends here: US cups/pints/quarts/gallons convert precisely to millilitres and litres. Note these are US customary volumes — the imperial (UK) gallon is ~20% larger at 4.546 L.

Formula

result = value × (from-unit factor ÷ to-unit factor), where factors are relative to the SI base unit.

Frequently Asked Questions

How exact are these conversions?

Factors use internationally agreed definitions — an inch is exactly 2.54 cm since 1959, a pound exactly 0.45359237 kg since 1959.

Why can't I enter zero or negatives?

Physical quantities here are magnitudes; negative lengths/weights are meaningless in this context.

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